ROCKY MOUNTAIN HYDROELECTRIC PLANT
OperatingHydro power plant
- Capacity
- 848 MW
- Primary fuel
- Hydro
- County
- Floyd County
- Operator
- OGLETHORPE POWER CORPORATION
- Status
- Operating
- Commissioned
- 1995
- EIA plant ID
- 6189
- Generators
- 3
- Technology
- Hydroelectric Pumped Storage
- Net generation (2024)
- -426 GWh
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 34.3555, -85.3039
ROCKY MOUNTAIN HYDROELECTRIC PLANT, an 848 MW Hydro power plant in Floyd County, Georgia. Operated by OGLETHORPE POWER CORPORATION, commissioned 1995.
How ROCKY MOUNTAIN HYDROELECTRIC PLANT compares
With 848 MW of capacity, ROCKY MOUNTAIN HYDROELECTRIC PLANT ranks 13th among the 104 operating power plants Bywatts maps in Georgia and is the largest of the 29 operating Hydro plants in the state. It accounts for about 24% of Georgia's operating Hydro capacity and 2.4% of all operating capacity in the state. Nationally it is the 25th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1995, it is newer than 66% of the 101 operating Georgia plants with a recorded commissioning year. Its operator, OGLETHORPE POWER CORPORATION, runs 8 operating plants in Georgia totaling 4,973 MW. It shares Floyd County with one other operating plant, ROME MILL.
EIA-860 lists 3 generators at the site with 848 MW of nameplate capacity, all hydroelectric pumped storage technology. The plant was a net consumer of electricity in 2024 (-426 GWh), which is typical of pumped storage.
Grid neighborhood
The closest transmission line found within 10 miles is a 230 kV line owned by GEORGIA TRANSMISSION CORP, under 0.1 miles away. One other operating power plant sits within 25 miles: ROME MILL (70 MW, Biomass).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
ROCKY MOUNTAIN HYDROELECTRIC PLANT is an 848 MW hydro power plant in Floyd County, GA, operated by OGLETHORPE POWER CORPORATION, commissioned in 1995. Floyd County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.8 of 5 at the 46th national percentile. Tornado is the leading peril, rated Relatively High by FEMA at the 83rd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Floyd County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Tornado | Relatively High | 83rd | 4.3 of 5 | 0.38 |
| Earthquake | Relatively Low | 79th | 4.2 of 5 | <0.01 |
| Lightning | Relatively Moderate | 79th | 4.1 of 5 | 61.8 |
| Strong wind | Relatively High | 73rd | 3.9 of 5 | 3.6 |
| Wildfire | Relatively Low | 61st | 3.4 of 5 | <0.01 |
| Hail | Relatively Moderate | 53rd | 3.1 of 5 | 5.4 |
| Hurricane | Relatively Low | 52nd | 3.1 of 5 | 0.03 |
| Riverine flooding | Relatively Moderate | 50th | 3.0 of 5 | 1.2 |
| Ice storm | Relatively Moderate | 48th | 2.9 of 5 | 0.57 |
| Heat wave | Relatively Low | 17th | 1.7 of 5 | 2.1 |
| Winter weather | Very Low | 10th | 1.4 of 5 | 4.0 |
Perils not assessed in Floyd County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Floyd County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.